51220011 has 16 divisors (see below), whose sum is σ = 71433216. Its totient is φ = 32583936.

The previous prime is 51219983. The next prime is 51220033. The reversal of 51220011 is 11002215.

51220011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51220011 - 2⁹ = 51219499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51620011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45886 + ... + 46988.

It is an arithmetic number, because the mean of its divisors is an integer number (4464576).

Almost surely, 2^51220011 is an apocalyptic number.

51220011 is a deficient number, since it is larger than the sum of its proper divisors (20213205).

51220011 is a wasteful number, since it uses less digits than its factorization.

51220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 51220011 is about 7156.8157025314. The cubic root of 51220011 is about 371.3754768640.

Adding to 51220011 its reverse (11002215), we get a palindrome (62222226).

The spelling of 51220011 in words is "fifty-one million, two hundred twenty thousand, eleven".